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Finding the Fourth Proportional to 664,688.60, 997,032.90 and 398,749.40

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Solution

The fourth proportional to 664,688.60, 997,032.90 and 398,749.40 is: 598,124.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,688.60 : 997,032.90 = 398,749.40 : x
  2. Step 2: Convert to fraction form
    664,688.60/997,032.90 = 398,749.40/x
  3. Step 3: Cross multiply
    664,688.60x = 997,032.90 × 398,749.40
  4. Step 4: Simplify right side
    664,688.60x = 397,566,270,655.26
  5. Step 5: Solve for x
    x = 397,566,270,655.26/664,688.60
  6. Step 6: Final answer
    x = 598,124.10

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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.